The Wasp

Naomie Harris stars as Heather, who approaches Carla (Natalie Dormer), a pregnant cashier in Bath, England, with a proposition that could change both of their lives forever. In exchange for £50,000 to kill her husband, Simon, Carla agrees to take on the task. As they plan the murder, Carla recalls the brutal bullying she suffered at Heather's hands as pre-teens. The film culminates in a shocking scene where Carla kills Heather just as Heather's husband enters the room.